Question

resolva (2x elevado a 2-9x+2)+(3x+7x-1)​

Answer 1

Resolva (2x elevado a 2-9x+2)+(3x+7x-1)​

2x^2 - 9x + 2 + 3x  + 7x - 1

2x^2 + x - 1  = 0

os coeficientes

a = 2. b = 1, c = -1

delta

d = 1 + 8 = 9

as raízes

x1 = (-1 + 3)/4 = 1/2

x2 = (-1 - 3)/4 =  -1